Device for cleaning motors



a. ,WENCKER.

DEVICE FOR CLEANING MOTORS. I APPLICATION HLED JULY 19, 1920.

INVENTOR.

GUSTA VE WENCKER,

I 2x I 4.4 I I I f v 4 \ww I HIS ATTORNEYS.

Patented Nov. 7, 1922.

Patented Nov. 7, 1922.

UNITED STATES PATENT OFFICE.-

GUSTAVE WENCKER, ST. LOUIS, MISSOURI.

nnvrcn roe CLEANING morons.

Application filed July 19, 1920. Serial No. 397,381.

T all whom it may concern:

Be it known that I, Gus'ravn VVENCKER, a citizen oftheUnited States, andresident of St Louis, Missouri, have invented a new 6 and usefulDevice-for Cleaning Motors, of

which the following is a specification.

This invention relates to a device for cleaning motors, and'it comprisesmechanism operated by the motor for driving air free from dust and dirtacross the" motor to prevent accumulations of dust and dirt in or on themotor.

The object of the invention is to provide a device for straining the airand driving the strained air across the motor to prevent dust and dirtfrom settling and accumulating in or on the motor.

Another object is to provide a device for the purpose mentionedcomprising a fan op erated by the motor to drive the air across themotor, in combination with an element for preventing the fan frominterfering with proper lubrication of the bearings.

Other objects will appear from the following description in whichreference is made to the drawing showing the invention, and in whichFig. 1 is a view showing the device in connection with a motor, portionsof the device being in section. In this view the strainer is rotated bythe motor.

Fig. 2 is a similar view of a modified construction in which thestrainer is stationarily supported.

Fig. 3 is a similar view in which the fan is located within the pulleydriven by the motor.

Fig. 4 is an elevation of the pulley and motor shown in Fig. 3, thestrainer device and its support being omitted.

As shown in Fig. 1, the motor 1 drives a shaft 2 upon which the pulley 3is mounted, whereby power is transmitted from the motor to a drivenmechanism not shown. In the embodiment shown in Fig. 1, the shaft 2 isextended from the motor on the side opposite from that on which thepulley 3 is supported, and a fan 4 is attached to the extended portionof said shaft. A fan 4 is constructed and arranged to drive the airtoward the motor and thereby prevent dust and dirt from settling andaccumulating upon the motor when the motor is running. :The fan is alsoeffective to blow from the motor any dust and dirt which settles thereonwhen the motor is stationary or idle. A disc 5 is supported between thefan and the motor andsaid disc is of sufiicient size to preventthe'motor from driving air into the motor bearings. In this way the fanis prevented from interfering with proper lubrication of the motor.

11: is preferable to drive clean air across the motor. Toaccomplishthisresult it is desirable to strain the air in order to prevent dirtand dust from being driven against or onto the motor by the fan. i Asshown in Fig. 1 a casing. 6 is supported upon the shaft 2 and rotatedthereby. Said casing encloses the fan so that all of the air driventoward the motor by the fan comes through the casing. The outer end ofthe casing is preferably open and supports a frame 7 covered by asection 8 of screen or cloth or other suitable material, through whichthe air may be drawn when the fan is in operation. The screen or cloth 8forms a strainer which removes the dirt and dust from the air, so thatthe fan only drives clean air across the motor.

Since the casing 6 which supports the screen revolves with the shaft 2,it is apparent that there will be no considerable accumulations of dustand dirt upon the screen, but that such accumulations will be thrown offby centrifugal force.

In the construction shown in Fig. 2, the casing 6 is stationarilysupported and does not revolve. The casing 6 in Fig. 2 is provided witha frame 7 and a strainer 8 similar to that shown in Fig. 1. Otherwisethe construction and arrangement shown in Fig. 2 are the same as theconstruction and arrangement shown in Fig. 1 and above described.

In the construction shown in Figs. 3 and 4, the pulley 9 by which themotor transmits power to the driven mechanism, encloses a series of fanvanes 10 Which drive air toward the motor. sity of extending the shafton the opposite side of the motor. The casing 11, shown in Fig. 3, withits frame 12 and strainer 13 are stationarily supported, as in Fig. 2,in which construction it will be seen that only clean air is driven tothe motor.

In the forms shown in Figs. 1 and 2 the fans not only serve to clean themotor, but also serve to blow the dust from the belt driven by thepulley 3, so that the belt is This eliminates the neces-- also kept in aclean condition. In the construction shown in Fig. 3 the fan operatesonly against the motor.

Other variations than those shown and described will readily suggestthemselves to those skilled in the art to which this invention relates.I do not restrict myself to unessential particulars, but what I claimand desire to secure by Letters Patent, is

1. The combination with a motor, ashaft driven by the motor, and a beltpulley on the shaft at one side of the motor, of a case supportedindependently of the motor in position to leave an open space betweenthe motor and the inner end of the case for the passage of air acrossthe outer surfaces of the motor, a fan attached to the shaft within thecase near said space and arranged to drive air through said spaceagainst. and acrossv the outer surfaces of the motor and the pulley, anda screen supported across the outer end of the case.

2. The combination with a motor, and a shaft driven by the motor, of acase supported independently of the motor having its inner and outerends open and in position to leave an open space between the in ner endthereof and the motor for the passage of air across the outer surfacesof the motor, a fan attached to the shaft a short distance from themotor and arranged to drive airthrough said space across'the outersurfaces of the motor, a frame extending from the outer end of the caseand having side and end openings, and a screen covering all of theopenings in said frame.

' 3. The combination with a motor, and a shaft driven by the motor, of acase supported independently of themotor and leaving an open spacebetween its inner end and the motor for the passage of air across theouter surfaces of the motor, a fan attached to the shaft within saidcase and arranged to drive air through said space across the outersurfaces of the motor, a plate between the fan and the motor preventingthe fan from driving air into the shaft bearings, and a screen supportedacross the outer end of said case. i a .v

. GUSTAVE VVENCKER.

